WO2002085676A1 - Systeme de bus de donnees pour capteurs d'un systeme de protection pour occupant d'une voiture - Google Patents

Systeme de bus de donnees pour capteurs d'un systeme de protection pour occupant d'une voiture Download PDF

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Publication number
WO2002085676A1
WO2002085676A1 PCT/DE2002/001335 DE0201335W WO02085676A1 WO 2002085676 A1 WO2002085676 A1 WO 2002085676A1 DE 0201335 W DE0201335 W DE 0201335W WO 02085676 A1 WO02085676 A1 WO 02085676A1
Authority
WO
WIPO (PCT)
Prior art keywords
data bus
sensors
bus line
impact
vehicle
Prior art date
Application number
PCT/DE2002/001335
Other languages
German (de)
English (en)
Inventor
Werner Nitschke
Klaus-Dieter Meier
Knut Balzer
Ewald Mauritz
Heiko Buehring
Hans Bogenrieder
Thomas Goernig
Michael Kaupp
Carsten Lorenz
Thomas Sumiec
Holger Wulff
Original Assignee
Robert Bosch Gmbh
Daimlerchrysler Ag
Conti Temic Microelectronic Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch Gmbh, Daimlerchrysler Ag, Conti Temic Microelectronic Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2002085676A1 publication Critical patent/WO2002085676A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01047—Architecture
    • B60R2021/01054—Bus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R2021/0104—Communication circuits for data transmission
    • B60R2021/01047—Architecture
    • B60R2021/01054—Bus
    • B60R2021/01068—Bus between different sensors and airbag control unit

Definitions

  • the invention relates to a data bus system for sensors of an occupant protection system according to the preamble * of claim 1. It also becomes a suitable one
  • Such data bus systems can be found, for example, in DE 38 1 1 21 7 C2, 1 98 1 3 963 A1 or also DE 197 40 021 A1.
  • bussträ 'length are mono- or multi-core cables, to each of which a plurality are arranged sensors and stand above addresses associated with the central unit in a data exchange. These are increasingly replacing the star-shaped individual connection of the sensors to the central unit, which would lead to a disproportionate amount of wiring if the number of sensors continues to increase.
  • impact sensors that generate a signal from a predetermined strength of the impact, or even so-called pre-crash sensors, are used, the latter monitoring the close range around the vehicle and in advance of an imminent collision with an object, which is to be classified as inevitable Send signal.
  • rotation rate sensors are increasingly being used to trigger the occupant protection devices even when a motor vehicle rolls over.
  • sensors in motor vehicles are already redundant for the different directions of impact, in particular for the vehicle. Front and side crash used.
  • Sensor arrangement enables the signals of one device to be used to check the signals of the other device.
  • the sensors are not merely redundant, but are distributed decentrally and at a distance from one another with regard to optimized signal recording in the vehicle (cf. WO 97/22009 A2, p. 3, lines 30-34).
  • the failed function can take place through the redundant sensor.
  • the redundant evaluation of the mutually redundant acceleration sensors in the right and left side of the vehicle is already known from DE 4425846 A1. In any case, however, there are no details about a data bus to be used
  • actuators that is to say release means of occupant protection devices, can also be arranged here and decide on their release based on the sensor data.
  • Airbags, belt tensioners as well as roll bars etc. are known as occupant protection devices.
  • the object of the invention is to present a data bus system for sensors of an occupant protection system, by means of which the advantages of sensors which are redundant with respect to one another are exploited even better and the reliability in the event of an accident is further increased.
  • This task is characterized by the characteristics of the
  • Claim 1 solved.
  • a suitable method for operating an occupant protection system based on such a data bus system is presented.
  • the starting point is the danger for data bus systems that the data bus in the collision zone is interrupted or even completely destroyed during an accident. It is therefore provided to use at least two data bus lines and to arrange the mutually redundant sensors in a different data bus line.
  • Impact direction of mutually redundant sensors which are arranged at different positions in the motor vehicle, there is a significantly lower probability of failure of the data bus system for this impact direction.
  • both sensors of the right and left vehicle halves are combined with each other in a data bus line - that is, in a first data bus line the sensors for a frontal impact from the right vehicle half and the sensors for a side impact from the left vehicle half are arranged in a second data bus line the sensors for a frontal impact from the leftguerhalfte and sensors for side impact from ⁇ rightsammlunghalfte.
  • FIG. 1 basic structure of a data bus system with two data bus lines
  • FIG. 1 shows the basic structure of a data bus system according to the invention.
  • at least two mutually redundant sensors are provided, here for the
  • Front area X sensors 3a and 3b, for example pre-crash or impact sensors, and for side impact area Y, each arranged on a vehicle side
  • Sensors 4a and 4b in particular acceleration sensors, since in these the redundancy to one another is due to the largely rigid connection via the
  • Vehicle body leads to a high degree of redundancy.
  • the sensors 3a, 3b and 4a, 4b which are redundant to one another are in this case connected to two data bus lines
  • 4a, 4b are each arranged in a different data bus line. As already sketched in FIG. 1, those which are mutually redundant with respect to an impact direction (X, Y) and are arranged on different data bus lines
  • a sensor is thus arranged in the motor vehicle at least for a frontal impact and a side impact in each half of the vehicle with respect to the longitudinal axis of the vehicle, the sensor 3a for a frontal impact from the right vehicle half and the sensor 4a for a side impact from the left vehicle half in a first data bus line 2a are arranged and in a second data bus line 2b the sensors 3b for a frontal impact from the left vehicle half and the sensors 4a for a side impact from the right vehicle half are arranged.
  • FIG. 2 now shows a further development, in which two side sensors are provided on each side, that is a total of four sensors for the side crash. For each half of the vehicle there are two mutually redundant sensors 4ar, 4br arranged different position, these sensors 4ar / 4br are each arranged in a different data bus line 2a / 2b.
  • FIG. 4 shows a further development in which further sensors 5a and 5b are additionally arranged in the rear area in the longitudinal direction X of the vehicle, these sensors, which are redundant to one another, also being distributed to the two data bus lines 2a and 2b, so that the sensor data of the redundant one in the event of a line failure
  • FIG. 5 now shows a further embodiment, in which a third data bus line 2c connects at least one of the redundant sensors 4cr1, 4cr2, 4cl1, 4cl2 per impact direction Y and vehicle halves to the central unit 1, while at least one further sensor per side 4ar, 4bl in another data bus line 2a or 2b is arranged.
  • the central unit 1 checks whether one of the data bus lines 2a, 2b, 2c has a defect and, if a data bus line is defective, the signals of the redundant sensors are detected in the at least one further data bus line. For this purpose, for example, the current flow in the bus, the amplitude of the bus voltage on the bus line (s) or, if necessary, with two bus lines of a line, the voltage symmetry between them is monitored and compared with setpoints. If, for example, the data bus line 2a fails in the embodiment according to FIG. 5, the sensor 3b is detected from the data bus line 2b for a front impact, and the sensors 4cr1, 4cr2 via a data bus line 2c for a right side impact.
  • the evaluation of the signals of the redundant sensors of the further data bus line preferably changes.
  • reduced threshold values are used in particular for the evaluation of the signals of the redundant sensor 4b of the further data bus line 2b in the event of a side crash, in order to be triggered in good time despite the delayed and weakened signal that can be identified there.
  • a distinction between a left-hand collision is possible using the sign of the acceleration signal.
  • the central unit gives the information in the event of a defect in a data bus line
  • Signals from those sensors which are redundant to the sensors in the failed data bus line are forwarded to the actuators via at least one remaining data bus line.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Bags (AREA)

Abstract

L'invention concerne un système de bus de données pour capteurs d'un système de protection pour occupant d'une voiture, qui comprend au moins deux capteurs (3a, 3b) redondants l'un par rapport à l'autre, fonctionnant dans au moins un sens d'impact, lesquels sont disposés respectivement dans une ligne de bus de données d'au moins une paire de lignes de bus de données (2a, 2b). De préférence, les capteurs montés tant dans la moitié de véhicule droite que dans la moitié de véhicule gauche sont réunis en une ligne de bus de données, c'est-à-dire que : dans une première ligne de bus de données sont montés les capteurs destinés à capter l'impact frontal à partir de la moitié de véhicule droite et les capteurs destinés à capter un impact latéral à partir de la moitié de véhicule gauche ; et dans une seconde ligne de bus de données sont montés les capteurs destinés à capter un impact frontal à partir de la moitié de véhicule gauche et les capteurs destinés à capter un impact latéral à partir de la moitié de véhicule droite. En cas de défectuosité d'une ligne de bus, une décision de déclenchement du système de protection d'occupant est prise sur la base des signaux des capteurs redondants faisant partie de la ligne de bus de données non endommagée, les conditions étant, de préférence, adaptées aux signaux, en particulier les seuils de déclenchement étant abaissés.
PCT/DE2002/001335 2001-04-21 2002-04-11 Systeme de bus de donnees pour capteurs d'un systeme de protection pour occupant d'une voiture WO2002085676A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2001119621 DE10119621A1 (de) 2001-04-21 2001-04-21 Datenbussystem für Sensoren eines Insassenschutzsystems
DE10119621.0 2001-04-21

Publications (1)

Publication Number Publication Date
WO2002085676A1 true WO2002085676A1 (fr) 2002-10-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2002/001335 WO2002085676A1 (fr) 2001-04-21 2002-04-11 Systeme de bus de donnees pour capteurs d'un systeme de protection pour occupant d'une voiture

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DE (1) DE10119621A1 (fr)
WO (1) WO2002085676A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007008392A (ja) * 2005-07-01 2007-01-18 Denso Corp 乗員保護システム
DE102005038616A1 (de) * 2005-08-16 2007-02-22 Trw Automotive Gmbh Verfahren zur Ansteuerung eines aktiven Rückhaltesystems
DE102005046929B3 (de) * 2005-09-30 2007-04-12 Siemens Ag Vorrichtung und Verfahren zum Auslösen einer Insassenschutzvorrichtung eines Kraftfahrzeuges
CN101535092B (zh) 2006-11-14 2012-05-23 三菱电机株式会社 乘客保护装置的启动装置

Citations (3)

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US4942571A (en) * 1987-09-08 1990-07-17 Bergmann Kabelwerke Ag On-board network for motor vehicles
US5508689A (en) * 1992-06-10 1996-04-16 Ford Motor Company Control system and method utilizing generic modules
US6018980A (en) * 1997-04-21 2000-02-01 Nec Home Electronics, Ltd. Method and device for determining deformation of a vehicle side part

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DE3811217A1 (de) * 1988-04-02 1989-10-12 Bosch Gmbh Robert Elektronische einrichtung
DE3816587A1 (de) * 1988-05-16 1989-11-23 Messerschmitt Boelkow Blohm Einrichtung zur ausloesung einer passiven sicherheitseinrichtung
US5001638A (en) * 1989-04-18 1991-03-19 The Boeing Company Integrated aircraft air data system
AT404656B (de) * 1992-10-16 1999-01-25 Semcotec Handel Leitungsredundantes feldbussystem, vorzugsweise mit ringtopologie
DE4425846A1 (de) * 1994-07-21 1996-01-25 Telefunken Microelectron Verfahren zur Auslösung von Seitenairbags einer passiven Sicherheitseinrichtung für Kraftfahrzeuge
JP3184227B2 (ja) * 1995-12-12 2001-07-09 シーメンス アクチエンゲゼルシヤフト 車両における拘束手段用の制御装置
DE19612423A1 (de) * 1996-03-28 1997-10-02 Siemens Ag Steuer- und Sicherheitssystem für Krananlagen
DE19740021A1 (de) * 1997-09-11 1999-03-25 Siemens Ag Einrichtung für den Insassenschutz in einem Kraftfahrzeug
DE19745689A1 (de) * 1997-10-16 1999-04-22 Bayerische Motoren Werke Ag Vorrichtung in Fahrzeugen
DE19829126A1 (de) * 1997-11-22 1999-05-27 Itt Mfg Enterprises Inc Elektromechanisches Bremssystem
DE19832167A1 (de) * 1997-11-22 1999-05-27 Itt Mfg Enterprises Inc Elektromechanisches Bremssystem
DE19807124A1 (de) * 1998-02-20 1999-09-02 Bosch Gmbh Robert Verfahren und Vorrichtung zum Auslösen eines Rückhaltesystems
DE19813963A1 (de) * 1998-03-28 1999-05-20 Telefunken Microelectron Sicherheitssystem in einem Personenbeförderungsmittel mit Steuermodulen für Insassenschutzeinrichtungen
JP2000255373A (ja) * 1999-03-02 2000-09-19 Mitsubishi Electric Corp 車両衝突検出装置
DE19918995A1 (de) * 1999-04-27 2000-11-16 Daimler Chrysler Ag Lenk- und Bremssystem für ein Fahrzeug

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4942571A (en) * 1987-09-08 1990-07-17 Bergmann Kabelwerke Ag On-board network for motor vehicles
US5508689A (en) * 1992-06-10 1996-04-16 Ford Motor Company Control system and method utilizing generic modules
US6018980A (en) * 1997-04-21 2000-02-01 Nec Home Electronics, Ltd. Method and device for determining deformation of a vehicle side part

Also Published As

Publication number Publication date
DE10119621A1 (de) 2002-10-24

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